Question

If 'x' and 'y' vary inversely as each other and x=30 when y=10.find y when x=20.

Answer 1

y=15 when x=20

• As x and y vary inversely

• X1Y1 = X2Y2

• x=30 when y=10

• Now if X=20 Y2 = Y

• 30×10 = 20×Y

• Y = 15